The Xtracycle is an adaptor that fits onto most any bike and turns it into a mean hauling machine. By changing the center of gravity, the Xtracycle has been used to haul all kinds of junk, including, oddly enough, other bicycles.
This thing, priced at about $200, can hold up to 200 pounds of stuff. Believe it or not, that guy is actually the only pall-bearer in a very hippie funeral. (Thanks, Dominic)
Xtracycle: Like An Xtra-cab For Your Bike [Treehugger]
